Carbureter



R. M. ANDERSON.

'CARBURETER. APPLIQIQTIION man APR- 8, 192:9.-

Patented Sept. 13, 1921.

INVENTORj.

,trrs RAYMOND M. ANDERSON, OF DETROIT, MICHIGAN, ASSIGNOR TO GEORGE M. HOLLEY OF DETROIT,

MICHIGAN.

GARBURETER.

Specification of To all whom it may concern.

Be it known that I, RAYMOND M. ANDER- soN, citizen of the United States, residing at Detroit, in the county of IVziyne and Stateof Michigan, have invented certain new and useful Improvements in Carbureters,' of which the following is a specification.

This invention relates to improvements in carbureters of the type in which an air vented fuel well supplies all the fuel required for both, low speed and high speed operation.

Figure I shows diagrammatically the cross sectional elevation of the carbureter. Fig. II shows a transverse vertical section taken at right angles to the plane in which Fig. I is taken.

The particular defect in carbureters of this type heretofore built has been that when transferring from thelow speed nozzle to the main nozzle, there has been within the air-vented fuel well, a sudden reversal 0 flow which reversal is the cause of irregular running and missing, especially noticeable when the engine is cold. To obviate this serious defect, the parts are so arranged that no reversal evertakes place, the .low speed fuel being led out of the air-vented well at I a point adjacent to the point at which the fuel for high speed is delivered into the main air passage.

Description.

The application of this principle to a plain tube carbureter is shown on the drawing in which A is the air entrance, B a restriction of venturi form, C is the mixture outlet controlled by a-throttle E is one auxiliary air passage, F is another. G andH are the outlets from the passage E'leading respectively to the Venturi tube B and to that portion of the mixture outlet C adjacent to the throttle valve, D. J is the outlet or nozzle from the passage F into the Venturi tube B and K is the constant level fuel reservoir feeding fuel into chamber L, connecting passage F and outlet J through the regulable fuel outlet M, controlled by a needle valve N. O is an adjustable means for regulating and atomizing the low speed fuel delivered adjacent to the lip of the throttle D and is provided with an eccentric cavity P and a communicating passage Q of suitable size. To facilitate starting a small bleeder B may be'provided betweenthe outlet or nozzle Letters Patent. Patented Sept.13, 1921..

1920. Serial No. 372,323.

G and the chamber L or the outlet G may be below the level of the fuel in K so that y when the engineis not runnin the assa es G and H may fill up with f liel. in ai ixillary throttle S may be provided in air entrance A. The operation of the carbureter 1S as follows:

On starting the engine the throttle is opened about one-fifth and the starting choke (S) closed four-fifths of the way. The engine is then cranked and the fuel lying in the passages (E), (G), and (H) is violently' ejected at (P) and there atomized by reason of the eddy at the tip of the throttle. The fuel lying in the passages (J) and (F) also commences to move by reason of the sub-atmospheric pressure within the vacuum chamber.

zle (J),'would, if no other provision were made or arranged, cause the fuel to leak over the outside of the nozzle and run down to be wasted. By the provision of the tube (Gr) this'fuel flows through (G) to the low speed tube (H). In addition to the fuel flowing down (G), fuel is picked up at (R) but the sizes of the various passages are so arranged that the fuel drawn through (B) does not cause a material drop of the level in the nozzle (J so that the fuel is always maintained at or near the tip of the nozzle (G). The fuel in the annular nozzle (J) is thus in actual movement, and its inertia is thus less detrimental than it otherwise would be when a-sudden demand is made upon the fuel in- (J), which demand occurs when the throttle is suddenly opened, the fuel in (F) supplying the demand. I claim:

1. In a carbureter, a main air passage, a throttle valve, a main fuel nozzle delivering into said main air passage on the atmospheric side of said throttle, a constant level reservoir having a regulable outlet, a passage connecting said reservoir outlet'and said fuel nozzle,v a low speed fuel outlet slightly in advance of thejthrottle valve, an auxiliary ing fuel into said auxiliary passage between the main'outlet from said nozzle and the low speed" fuel outlet.

2. In a carbureter, a main air passage, athrottle valve, a main fuel nozzle delivering into said main air passage on the atmos-' pheric side of said throttle, a constant level reservoir having a 'regulab le outle a passage connecting said reservoir outlet and said fuel nozzle, a 10W speed fuel outlet slightly in advance of the throttle valve, an auxiliary air passage connecting the main outlet from 'saidgmain fuel nozzle and the lotv speed fuel Outlet and an auxiliarv fuel orifice delivering fuel from the main nozzle into said auxiliary passage between the main outlet from said nozzle and the'low speed fuel outlet;

In testimonywhereof I afiix mylsignature.

RAYMOND M. ANDERSON. 

